Infrared Skin‐Like Active Stretchable Electronics Based on Organic–Inorganic Composite Structures for Promotion of Cutaneous Wound Healing

Zhang, Lijuan; Jiang, Xiaoxiao; Jiang, Wei; Li, Shuang; Chi, Yuxi; Liu, Hao; Zhang, Maoyi; Li, Juyao; Fang, Min; Pan, Bing; Chen, Yuli; Shen, Chuanan; Guo, Xu; Li, Rui; Guo, Liang; Su, Yewang

doi:10.1002/admt.201900150

Cited by 24 publications

(23 citation statements)

References 48 publications

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“…The simple fabrication of elastic conductors via solution process is highly desirable for various applications, such as strain/pressure sensors, biosignal sensing electrodes, and signal transmission wires for stretchable electronics, to realize their functions in health monitoring, medical therapy, and soft robotics . For applications to human skin and humanoid robots, stretchability of over 55% and good mechanical durability for thousands of cycles of deformation are needed for long‐term stable operation .…”

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confidence: 99%

Highly Stretchable Metallic Nanowire Networks Reinforced by the Underlying Randomly Distributed Elastic Polymer Nanofibers via Interfacial Adhesion Improvement

et al. 2019

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functions in health monitoring, [12,13] medical therapy, [14] and soft robotics. [15,16] For applications to human skin and humanoid robots, stretchability of over 55% and good mechanical durability for thousands of cycles of deformation are needed for longterm stable operation. [9] High conductivity (over 5000 S cm −1 ) contributes to reducing power loss in wirings [3,17] and reducing noise for biosignal sensing electrodes. [18] Nanomesh-type elastic conductors with porous structure are effective in reducing skin inflammation owing to their gas permeability; [19] thus, they are very promising candidates for on-skin electronics. Achieving high stretchability and conductivity in single materials is very difficult and rare, and a successful approach for elastic conductors is to include two conductive and elastic components. [19][20][21] A pioneer study on porous elastic conductors coated Ag nanoparticles with poly(styrenebutadiene-styrene) fibers more than 150 µm thick, achieving 5215 S cm −1 conductivity with 140% maximum stretchability. [20] Replacing nanoparticles with nanowires is an effective approach to further increase conductivity and decrease resistance change from release status to stretch status. A 3 µm thick polyamide nanofiber (NF)/Ag nanowire (NW) bilayer conductor has been reported to achieve 8 Ω sq −1 sheet resistance (less than 500 S cm −1 ) and 50% stretchability with 85% transmittance at 550 nm wavelength. [21] However, it remains challenging for nanomesh-type elastic conductors to simultaneously achieve high conductivity (5000 S cm −1 ), stretchability (55%), and cyclic mechanical durability for skin-attachable electronics. Achieving high stretchability and good durability is very difficult when simply mixing conductive and polymer materials. Conductive networks and polymer scaffold can easily detach when stretched since the adhesion between them from van der Waals forces is very weak, resulting in rapid degradation of conductivity or even failure of nanomeshtype elastic conductors. On the other hand, adding large amounts of binder materials to enhance the bonding between conductive networks and elastic scaffold often results in lower conductivity, [22][23][24][25] and even the loss of their porous nanostructure. [26][27][28][29] Here, we report a simple bottom-up fabrication approach for porous nanomesh-type elastic conductors with high On-skin electronics require conductive, porous, and stretchable materials for a stable operation with minimal invasiveness to the human body. However, porous elastic conductors that simultaneously achieve high conductivity, good stretchability, and durability are rare owing to the lack of proper design for good adhesion between porous elastic polymer and conductive metallic networks. Here, a simple fabrication approach for porous nanomesh-type elastic conductors is shown by designing a layer-by-layer structure of nanofibers/nanowires (NFs/NWs) via interfacial hydrogen bonding. The as-prepared conductors, consisting of Ag NWs and polyurethane (PU) NFs, simultaneo...

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confidence: 99%

Highly Stretchable Metallic Nanowire Networks Reinforced by the Underlying Randomly Distributed Elastic Polymer Nanofibers via Interfacial Adhesion Improvement

et al. 2019

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“…Some studies have found that wound healing can be promoted by the near infrared light or low-level laser therapy, which is useful for promoting the fibroblast migration and reducing the inflammatory phase. [10][11] Studies have also found that the activity of Rac1 protein in fibroblasts plays a vital role in wound healing. Most experiments have proven that increasing the activity of Rac1 protein in fibroblasts can significantly promote wound healing.…”

Section: Introductionmentioning

confidence: 99%

Flexible Ultrasonic Patch for Accelerating Chronic Wound Healing

Lyu

Chen

et al. 2021

Adv Healthcare Materials

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Ultrasound treatment is an effective method for accelerating chronic wound healing. However, it is not widely used because traditional ultrasonic probes cannot be conformal to the wound surface, which leads to limitations of use and unstable treatment effects. In addition, the use of liquid coupling agent increases the chance of wound infection. A strategy is proposed to design and fabricate a flexible ultrasonic patch for treating chronic wounds effectively. The piezoelectric ceramic in the patch is discretized into several linearly arranged units, which are integrated on a flexible circuit substrate. A thin hydrogel patch is used as both encapsulation and coupling layer to avoid wound infection and ensure the penetration of ultrasound. The ultrasonic patch is soft, light, and can completely conform to the treatment area. Bending of the patch focuses the sound beams on the center of the bending circle, which achieves control of the target treatment area. Ultrasound treatment experiments are carried out on some type‐II diabetic rats. Immunohistochemical (IHC) results indicate that ultrasound accelerates wound healing by activating Rac1 in both dermal and epidermal layers. Treatment results show that wound treated with the ultrasound heals faster than wounds without. The healing time is shortened by ≈40%.

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“…[ 1,2 ] Now, the corresponding endeavors have been shifted to the design and fabrication of near‐infrared (NIR) emitting OLED devices with peak emission wavelength (λ max ) ≥ 700 nm for its latent applications in night‐vision readable marking, telecommunication, noninvasive cutaneous wound healing, bioimaging, and photodynamic therapy. [ 3–7 ]…”

Section: Introductionmentioning

confidence: 99%

High Performance NIR OLEDs with Low Efficiency Roll‐Off by Leveraging Os(II) Phosphors and Exciplex Co‐Host

Zhu

Tan

Chen

et al. 2021

Adv Funct Materials

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Near‐infrared (NIR) organic‐light emitting devices (OLEDs) with high radiance are useful for applications including invisible marking, communication, and biomedical imaging. However, performances of NIR OLEDs are typically limited by their severe efficiency roll‐offs at high current density. Herein, three isoquinolinyl azolate based Os(II) complexes (Isq‐1–3) with short radiative decay lifetime (in hundreds of ns), and photoluminescence with peak wavelengths > 745 nm and quantum yield up to 48% as doped thin films, are reported. Upon concomitant employment of exciplex‐forming co‐host (tris(4‐carbazoyl‐9‐ylphenyl)amine and 2,4,6‐tris(biphenyl‐3‐yl)‐1,3,5‐triazine), efficiency roll‐off is greatly reduced, giving external quantum efficiency of 9.66% at a current density of 300 mA cm−2. A maximum radiance over 170 W sr−1 m−2 is also achieved in devices based on Isq‐2 and Isq‐3.

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Infrared Skin‐Like Active Stretchable Electronics Based on Organic–Inorganic Composite Structures for Promotion of Cutaneous Wound Healing

Cited by 24 publications

References 48 publications

Highly Stretchable Metallic Nanowire Networks Reinforced by the Underlying Randomly Distributed Elastic Polymer Nanofibers via Interfacial Adhesion Improvement

Highly Stretchable Metallic Nanowire Networks Reinforced by the Underlying Randomly Distributed Elastic Polymer Nanofibers via Interfacial Adhesion Improvement

Flexible Ultrasonic Patch for Accelerating Chronic Wound Healing

High Performance NIR OLEDs with Low Efficiency Roll‐Off by Leveraging Os(II) Phosphors and Exciplex Co‐Host

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